晚更新世晚期以来滇西北高原的孢粉记录与我国南方石笋记录的气候变化对比研究  

Comparative study on climatic change during later period of the late Pleistocene epoch with the sporopollen record from northwest Yunnan plateau and the stalagmite record from South China

作　　者：石胜强[1] 袁道先[1] 罗伦德[1] 郝秀东[1] 赵增友[1] 

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《中国岩溶》2011年第2期119-127,共9页Carsologica Sinica

基　　金：国土资源部;广西壮族自治区岩溶动力学重点实验室开放课题基金项目(KDL2008-15);西南大学青年基金项目(swu208001);现代古生物学与地层学国家重点实验室开放基金(073112)

摘　　要：运用古气候参数方法对滇西北高原YXL剖面进行孢粉分析,结合定年数据,重建了该地区晚更新世晚期以来的植被变化和气候变化并与我国南方石笋记录等进行对比分析。研究表明:从大约31 570 cal.yr BP以来,滇西北高原总体经历了温凉偏干-冷干-略转暖湿-冷干-转暖增湿-冷干-转为暖湿-温和偏干-温凉偏干的气候变化历程,其间多有反复;YXL剖面孢粉记录与董哥洞、葫芦洞石笋记录在古气候变化大趋势上基本一致,对H2、H1、YD、MWP、LIA等气候事件反映明显;YXL剖面孢粉记录中全新世大暖期升温增湿的速度慢于石笋记录和冰芯记录,其干冷气候期持续时间较长,这些特点均与高原环境有关,并受到青藏高原的影响,具有一定的区域性意义。Sporopollen analysis on the YXL profile in northwest Yunnan plateau is done by means of paleoclimate parameter methods,and changes in paleo-vegetation and paleoclimate during later period of the late Pleistocene epoch is reconstructed in combining with dating figures in the paper.Furthermore,comparative analysis with the stalagmite record from South China is done.The results show that,the process of paleoclimate change in plateau of Yunnan Province is moderate cool and a little dry-cold and dry-slightly warmer and wetter-cold and dry-warmer and wetter-cold and dry-warm and wet–moderate and a little dry-cool and a little dry from about 31 570 cal.yr BP and there are some reversals in the process;YXL pollen record shows nearly same trend of Paleoclimate change contrast with the stalagmites record in the Dongge Cave and Hulu Cave,the climate events including H2,H1,YD,MWP,LIA appeared in the pollen record obviously;the process of warmer and wetter in YXL pollen record in Holocene seemed slower than that in the stalagmite records and ice core records,and in YXL pollen record the dry and cold climate last much longer,it is related with the high altitude environment and impacted by the Qinghai-Tibetan Plateau,showing some regional significance.

关 键 词：滇西北高原 香格里拉 孢粉记录 石笋记录 孢粉带 植被 气候变化 

分 类 号：P532[天文地球—古生物学与地层学] Q913.85[天文地球—地质学]